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ffmpeg/ffprobe.c

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/*
* ffprobe : Simple Media Prober based on the FFmpeg libraries
* Copyright (c) 2007-2010 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/dict.h"
#include "libavdevice/avdevice.h"
#include "cmdutils.h"
const char program_name[] = "ffprobe";
const int program_birth_year = 2007;
static int do_show_format = 0;
static int do_show_packets = 0;
static int do_show_streams = 0;
static int show_value_unit = 0;
static int use_value_prefix = 0;
static int use_byte_value_binary_prefix = 0;
static int use_value_sexagesimal_format = 0;
static char *print_format;
/* globals */
static const OptionDef options[];
/* FFprobe context */
static const char *input_filename;
static AVInputFormat *iformat = NULL;
static const char *binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
static const char *decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P" };
static const char *unit_second_str = "s" ;
static const char *unit_hertz_str = "Hz" ;
static const char *unit_byte_str = "byte" ;
static const char *unit_bit_per_second_str = "bit/s";
void exit_program(int ret)
{
exit(ret);
}
static char *value_string(char *buf, int buf_size, double val, const char *unit)
{
if (unit == unit_second_str && use_value_sexagesimal_format) {
double secs;
int hours, mins;
secs = val;
mins = (int)secs / 60;
secs = secs - mins * 60;
hours = mins / 60;
mins %= 60;
snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
} else if (use_value_prefix) {
const char *prefix_string;
int index;
if (unit == unit_byte_str && use_byte_value_binary_prefix) {
index = (int) (log(val)/log(2)) / 10;
index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1);
val /= pow(2, index*10);
prefix_string = binary_unit_prefixes[index];
} else {
index = (int) (log10(val)) / 3;
index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1);
val /= pow(10, index*3);
prefix_string = decimal_unit_prefixes[index];
}
snprintf(buf, buf_size, "%.3f%s%s%s", val, prefix_string || show_value_unit ? " " : "",
prefix_string, show_value_unit ? unit : "");
} else {
snprintf(buf, buf_size, "%f%s%s", val, show_value_unit ? " " : "",
show_value_unit ? unit : "");
}
return buf;
}
static char *time_value_string(char *buf, int buf_size, int64_t val, const AVRational *time_base)
{
if (val == AV_NOPTS_VALUE) {
snprintf(buf, buf_size, "N/A");
} else {
value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
}
return buf;
}
static char *ts_value_string (char *buf, int buf_size, int64_t ts)
{
if (ts == AV_NOPTS_VALUE) {
snprintf(buf, buf_size, "N/A");
} else {
snprintf(buf, buf_size, "%"PRId64, ts);
}
return buf;
}
static const char *media_type_string(enum AVMediaType media_type)
{
const char *s = av_get_media_type_string(media_type);
return s ? s : "unknown";
}
struct writer {
const char *name;
const char *item_sep; ///< separator between key/value couples
const char *items_sep; ///< separator between sets of key/value couples
const char *section_sep; ///< separator between sections (streams, packets, ...)
const char *header, *footer;
void (*print_section_start)(const char *, int);
void (*print_section_end) (const char *, int);
void (*print_header)(const char *);
void (*print_footer)(const char *);
void (*print_integer)(const char *, int);
void (*print_string)(const char *, const char *);
void (*show_tags)(struct writer *w, AVDictionary *dict);
};
/* JSON output */
static void json_print_header(const char *section)
{
printf("{\n");
}
static char *json_escape_str(const char *s)
{
static const char json_escape[] = {'"', '\\', '\b', '\f', '\n', '\r', '\t', 0};
static const char json_subst[] = {'"', '\\', 'b', 'f', 'n', 'r', 't', 0};
char *ret, *p;
int i, len = 0;
// compute the length of the escaped string
for (i = 0; s[i]; i++) {
if (strchr(json_escape, s[i])) len += 2; // simple escape
else if ((unsigned char)s[i] < 32) len += 6; // handle non-printable chars
else len += 1; // char copy
}
p = ret = av_malloc(len + 1);
if (!p)
return NULL;
for (i = 0; s[i]; i++) {
char *q = strchr(json_escape, s[i]);
if (q) {
*p++ = '\\';
*p++ = json_subst[q - json_escape];
} else if ((unsigned char)s[i] < 32) {
snprintf(p, 7, "\\u00%02x", s[i] & 0xff);
p += 6;
} else {
*p++ = s[i];
}
}
*p = 0;
return ret;
}
static void json_print_str(const char *key, const char *value)
{
char *key_esc = json_escape_str(key);
char *value_esc = json_escape_str(value);
printf(" \"%s\": \"%s\"",
key_esc ? key_esc : "",
value_esc ? value_esc : "");
av_free(key_esc);
av_free(value_esc);
}
static void json_print_int(const char *key, int value)
{
char *key_esc = json_escape_str(key);
printf(" \"%s\": %d", key_esc ? key_esc : "", value);
av_free(key_esc);
}
static void json_print_footer(const char *section)
{
printf("\n }");
}
static void json_print_section_start(const char *section, int multiple_entries)
{
char *section_esc = json_escape_str(section);
printf("\n \"%s\":%s", section_esc ? section_esc : "",
multiple_entries ? " [" : " ");
av_free(section_esc);
}
static void json_print_section_end(const char *section, int multiple_entries)
{
if (multiple_entries)
printf("]");
}
/* Default output */
static void default_print_header(const char *section)
{
printf("[%s]\n", section);
}
static void default_print_str(const char *key, const char *value)
{
printf("%s=%s", key, value);
}
static void default_print_int(const char *key, int value)
{
printf("%s=%d", key, value);
}
static void default_print_footer(const char *section)
{
printf("\n[/%s]", section);
}
/* Print helpers */
struct print_buf {
char *s;
int len;
};
static char *fast_asprintf(struct print_buf *pbuf, const char *fmt, ...)
{
va_list va;
int len;
va_start(va, fmt);
len = vsnprintf(NULL, 0, fmt, va);
va_end(va);
if (len < 0)
goto fail;
if (pbuf->len < len) {
char *p = av_realloc(pbuf->s, len + 1);
if (!p)
goto fail;
pbuf->s = p;
pbuf->len = len;
}
va_start(va, fmt);
len = vsnprintf(pbuf->s, len + 1, fmt, va);
va_end(va);
if (len < 0)
goto fail;
return pbuf->s;
fail:
av_freep(&pbuf->s);
pbuf->len = 0;
return NULL;
}
#define print_fmt0(k, f, ...) do { \
if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \
w->print_string(k, pbuf.s); \
} while (0)
#define print_fmt( k, f, ...) do { \
if (w->item_sep) \
printf("%s", w->item_sep); \
print_fmt0(k, f, __VA_ARGS__); \
} while (0)
#define print_int0(k, v) w->print_integer(k, v)
#define print_int( k, v) do { \
if (w->item_sep) \
printf("%s", w->item_sep); \
print_int0(k, v); \
} while (0)
#define print_str0(k, v) print_fmt0(k, "%s", v)
#define print_str( k, v) print_fmt (k, "%s", v)
static void show_packet(struct writer *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx)
{
char val_str[128];
AVStream *st = fmt_ctx->streams[pkt->stream_index];
struct print_buf pbuf = {.s = NULL};
if (packet_idx)
printf("%s", w->items_sep);
w->print_header("PACKET");
print_str0("codec_type", media_type_string(st->codec->codec_type));
print_int("stream_index", pkt->stream_index);
print_str("pts", ts_value_string (val_str, sizeof(val_str), pkt->pts));
print_str("pts_time", time_value_string(val_str, sizeof(val_str), pkt->pts, &st->time_base));
print_str("dts", ts_value_string (val_str, sizeof(val_str), pkt->dts));
print_str("dts_time", time_value_string(val_str, sizeof(val_str), pkt->dts, &st->time_base));
print_str("duration", ts_value_string (val_str, sizeof(val_str), pkt->duration));
print_str("duration_time", time_value_string(val_str, sizeof(val_str), pkt->duration, &st->time_base));
print_str("size", value_string (val_str, sizeof(val_str), pkt->size, unit_byte_str));
print_fmt("pos", "%"PRId64, pkt->pos);
print_fmt("flags", "%c", pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_');
w->print_footer("PACKET");
av_free(pbuf.s);
fflush(stdout);
}
static void show_packets(struct writer *w, AVFormatContext *fmt_ctx)
{
AVPacket pkt;
int i = 0;
av_init_packet(&pkt);
while (!av_read_frame(fmt_ctx, &pkt))
show_packet(w, fmt_ctx, &pkt, i++);
}
static void json_show_tags(struct writer *w, AVDictionary *dict)
{
AVDictionaryEntry *tag = NULL;
struct print_buf pbuf = {.s = NULL};
int first = 1;
if (!dict)
return;
printf(",\n \"tags\": {\n");
while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
if (first) {
print_str0(tag->key, tag->value);
first = 0;
} else {
print_str(tag->key, tag->value);
}
}
printf("\n }");
av_free(pbuf.s);
}
static void default_show_tags(struct writer *w, AVDictionary *dict)
{
AVDictionaryEntry *tag = NULL;
struct print_buf pbuf = {.s = NULL};
while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
printf("\nTAG:");
print_str0(tag->key, tag->value);
}
av_free(pbuf.s);
}
static void show_stream(struct writer *w, AVFormatContext *fmt_ctx, int stream_idx)
{
AVStream *stream = fmt_ctx->streams[stream_idx];
AVCodecContext *dec_ctx;
AVCodec *dec;
char val_str[128];
AVRational display_aspect_ratio;
struct print_buf pbuf = {.s = NULL};
if (stream_idx)
printf("%s", w->items_sep);
w->print_header("STREAM");
print_int0("index", stream->index);
if ((dec_ctx = stream->codec)) {
if ((dec = dec_ctx->codec)) {
print_str("codec_name", dec->name);
print_str("codec_long_name", dec->long_name);
} else {
print_str("codec_name", "unknown");
}
print_str("codec_type", media_type_string(dec_ctx->codec_type));
print_fmt("codec_time_base", "%d/%d", dec_ctx->time_base.num, dec_ctx->time_base.den);
/* print AVI/FourCC tag */
av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
print_str("codec_tag_string", val_str);
print_fmt("codec_tag", "0x%04x", dec_ctx->codec_tag);
switch (dec_ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
print_int("width", dec_ctx->width);
print_int("height", dec_ctx->height);
print_int("has_b_frames", dec_ctx->has_b_frames);
if (dec_ctx->sample_aspect_ratio.num) {
print_fmt("sample_aspect_ratio", "%d:%d",
dec_ctx->sample_aspect_ratio.num,
dec_ctx->sample_aspect_ratio.den);
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
dec_ctx->width * dec_ctx->sample_aspect_ratio.num,
dec_ctx->height * dec_ctx->sample_aspect_ratio.den,
1024*1024);
print_fmt("display_aspect_ratio", "%d:%d",
display_aspect_ratio.num,
display_aspect_ratio.den);
}
print_str("pix_fmt", dec_ctx->pix_fmt != PIX_FMT_NONE ? av_pix_fmt_descriptors[dec_ctx->pix_fmt].name : "unknown");
print_int("level", dec_ctx->level);
break;
case AVMEDIA_TYPE_AUDIO:
print_str("sample_rate", value_string(val_str, sizeof(val_str), dec_ctx->sample_rate, unit_hertz_str));
print_int("channels", dec_ctx->channels);
print_int("bits_per_sample", av_get_bits_per_sample(dec_ctx->codec_id));
break;
}
} else {
print_str("codec_type", "unknown");
}
if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
print_fmt("id=", "0x%x", stream->id);
print_fmt("r_frame_rate", "%d/%d", stream->r_frame_rate.num, stream->r_frame_rate.den);
print_fmt("avg_frame_rate", "%d/%d", stream->avg_frame_rate.num, stream->avg_frame_rate.den);
print_fmt("time_base", "%d/%d", stream->time_base.num, stream->time_base.den);
print_str("start_time", time_value_string(val_str, sizeof(val_str), stream->start_time, &stream->time_base));
print_str("duration", time_value_string(val_str, sizeof(val_str), stream->duration, &stream->time_base));
if (stream->nb_frames)
print_fmt("nb_frames", "%"PRId64, stream->nb_frames);
w->show_tags(w, stream->metadata);
w->print_footer("STREAM");
av_free(pbuf.s);
fflush(stdout);
}
static void show_streams(struct writer *w, AVFormatContext *fmt_ctx)
{
int i;
for (i = 0; i < fmt_ctx->nb_streams; i++)
show_stream(w, fmt_ctx, i);
}
static void show_format(struct writer *w, AVFormatContext *fmt_ctx)
{
char val_str[128];
struct print_buf pbuf = {.s = NULL};
w->print_header("FORMAT");
print_str0("filename", fmt_ctx->filename);
print_int("nb_streams", fmt_ctx->nb_streams);
print_str("format_name", fmt_ctx->iformat->name);
print_str("format_long_name", fmt_ctx->iformat->long_name);
print_str("start_time", time_value_string(val_str, sizeof(val_str), fmt_ctx->start_time, &AV_TIME_BASE_Q));
print_str("duration", time_value_string(val_str, sizeof(val_str), fmt_ctx->duration, &AV_TIME_BASE_Q));
print_str("size", value_string(val_str, sizeof(val_str), fmt_ctx->file_size, unit_byte_str));
print_str("bit_rate", value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate, unit_bit_per_second_str));
w->show_tags(w, fmt_ctx->metadata);
w->print_footer("FORMAT");
av_free(pbuf.s);
fflush(stdout);
}
static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
{
int err, i;
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *t;
if ((err = avformat_open_input(&fmt_ctx, filename, iformat, &format_opts)) < 0) {
print_error(filename, err);
return err;
}
if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
return AVERROR_OPTION_NOT_FOUND;
}
/* fill the streams in the format context */
if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
print_error(filename, err);
return err;
}
av_dump_format(fmt_ctx, 0, filename, 0);
/* bind a decoder to each input stream */
for (i = 0; i < fmt_ctx->nb_streams; i++) {
AVStream *stream = fmt_ctx->streams[i];
AVCodec *codec;
if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
fprintf(stderr, "Unsupported codec with id %d for input stream %d\n",
stream->codec->codec_id, stream->index);
} else if (avcodec_open2(stream->codec, codec, NULL) < 0) {
fprintf(stderr, "Error while opening codec for input stream %d\n",
stream->index);
}
}
*fmt_ctx_ptr = fmt_ctx;
return 0;
}
#define WRITER_FUNC(func) \
.print_header = func ## _print_header, \
.print_footer = func ## _print_footer, \
.print_integer = func ## _print_int, \
.print_string = func ## _print_str, \
.show_tags = func ## _show_tags
static struct writer writers[] = {{
.name = "default",
.item_sep = "\n",
.items_sep = "\n",
.section_sep = "\n",
.footer = "\n",
WRITER_FUNC(default),
},{
.name = "json",
.header = "{",
.item_sep = ",\n",
.items_sep = ",",
.section_sep = ",",
.footer = "\n}\n",
.print_section_start = json_print_section_start,
.print_section_end = json_print_section_end,
WRITER_FUNC(json),
}
};
static int get_writer(const char *name)
{
int i;
if (!name)
return 0;
for (i = 0; i < FF_ARRAY_ELEMS(writers); i++)
if (!strcmp(writers[i].name, name))
return i;
return -1;
}
#define SECTION_PRINT(name, multiple_entries, left) do { \
if (do_show_ ## name) { \
if (w->print_section_start) \
w->print_section_start(#name, multiple_entries); \
show_ ## name (w, fmt_ctx); \
if (w->print_section_end) \
w->print_section_end(#name, multiple_entries); \
if (left) \
printf("%s", w->section_sep); \
} \
} while (0)
static int probe_file(const char *filename)
{
AVFormatContext *fmt_ctx;
int ret, writer_id;
struct writer *w;
writer_id = get_writer(print_format);
if (writer_id < 0) {
fprintf(stderr, "Invalid output format '%s'\n", print_format);
return AVERROR(EINVAL);
}
w = &writers[writer_id];
if ((ret = open_input_file(&fmt_ctx, filename)))
return ret;
if (w->header)
printf("%s", w->header);
SECTION_PRINT(packets, 1, do_show_streams || do_show_format);
SECTION_PRINT(streams, 1, do_show_format);
SECTION_PRINT(format, 0, 0);
if (w->footer)
printf("%s", w->footer);
av_close_input_file(fmt_ctx);
return 0;
}
static void show_usage(void)
{
printf("Simple multimedia streams analyzer\n");
printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
printf("\n");
}
static int opt_format(const char *opt, const char *arg)
{
iformat = av_find_input_format(arg);
if (!iformat) {
fprintf(stderr, "Unknown input format: %s\n", arg);
return AVERROR(EINVAL);
}
return 0;
}
static void opt_input_file(void *optctx, const char *arg)
{
if (input_filename) {
fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
arg, input_filename);
exit(1);
}
if (!strcmp(arg, "-"))
arg = "pipe:";
input_filename = arg;
}
static int opt_help(const char *opt, const char *arg)
{
const AVClass *class = avformat_get_class();
av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:\n", 0, 0);
printf("\n");
av_opt_show2(&class, NULL,
AV_OPT_FLAG_DECODING_PARAM, 0);
return 0;
}
static int opt_pretty(const char *opt, const char *arg)
{
show_value_unit = 1;
use_value_prefix = 1;
use_byte_value_binary_prefix = 1;
use_value_sexagesimal_format = 1;
return 0;
}
static const OptionDef options[] = {
#include "cmdutils_common_opts.h"
{ "f", HAS_ARG, {(void*)opt_format}, "force format", "format" },
{ "unit", OPT_BOOL, {(void*)&show_value_unit}, "show unit of the displayed values" },
{ "prefix", OPT_BOOL, {(void*)&use_value_prefix}, "use SI prefixes for the displayed values" },
{ "byte_binary_prefix", OPT_BOOL, {(void*)&use_byte_value_binary_prefix},
"use binary prefixes for byte units" },
{ "sexagesimal", OPT_BOOL, {(void*)&use_value_sexagesimal_format},
"use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
{ "pretty", 0, {(void*)&opt_pretty},
"prettify the format of displayed values, make it more human readable" },
{ "print_format", OPT_STRING | HAS_ARG, {(void*)&print_format}, "set the output printing format (available formats are: default, json)" },
{ "show_format", OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
{ "show_packets", OPT_BOOL, {(void*)&do_show_packets}, "show packets info" },
{ "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info" },
{ "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },
{ "i", HAS_ARG, {(void *)opt_input_file}, "read specified file", "input_file"},
{ NULL, },
};
int main(int argc, char **argv)
{
int ret;
av_register_all();
init_opts();
#if CONFIG_AVDEVICE
avdevice_register_all();
#endif
show_banner();
parse_options(NULL, argc, argv, options, opt_input_file);
if (!input_filename) {
show_usage();
fprintf(stderr, "You have to specify one input file.\n");
fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'.\n", program_name);
exit(1);
}
ret = probe_file(input_filename);
return ret;
}
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